Cutting assembly protection device, mower cutting assembly and mower

Abstract

The utility model discloses a cutting assembly protection device which comprises a protection plate arranged below a mowing disc, the protection plate serves as the end of a height adjusting and cutting assembly of a mower, and the protection plate is in a static or rotating state relative to the mowing disc in the rotating state. The utility model further discloses a mowing machine cutting assembly and a mowing machine. The protective plate is arranged at the bottom of the mowing disc, so that impact of abnormal external force on the mowing disc is effectively isolated, and blades mounted on the mowing disc are protected from being damaged due to impact of the external force. Besides, the protective plate effectively avoids the phenomenon that the power consumption of the mower is increased due to the phenomena of grass clamping and the like of the mowing disc, and the blade mounted on the mowing disc is movably connected with the mowing disc in a rotating shaft manner, so that the blade can be accommodated in the mowing disc and the protective plate when being subjected to excessive resistance, and the blade and the rotating shaft are effectively protected; the protection plates are connected in a bearing mode and do not rotate synchronously along with the mowing disc, the load of the motor is reduced, and stability is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of garden machinery and equipment, and relates to a cutting component protection device, a lawn mower cutting component and a lawn mower. Background Art

[0002] A lawn mower mows grass using a cutting assembly with blades. The cutting assembly of existing lawn mowers is usually exposed. During the mowing process, the cutting assembly, especially the blades, will inevitably collide with hard objects (such as stones). The cutting assembly may also be caught by grass during high-speed operation. Collisions with hard objects can easily damage the cutting assembly, such as missing cutting edges on the mowing blades, which affects the service life of the mowing blades. The situation in which the cutting assembly is contaminated by grass may cause the blade shaft to become stuck, and when the cutting assembly is running at high speed, it will increase the workload of the cutting assembly, resulting in increased power consumption of the lawn mower. Utility Model Content

[0003] The purpose of the utility model is to reduce the probability of damage to the cutting assembly of a lawn mower during the cutting process and to avoid as much as possible the situation where the power consumption of the lawn mower is increased due to phenomena such as grass clamping. To this end, a cutting assembly protection device, a lawn mower cutting assembly and a lawn mower are provided.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A cutting assembly protection device comprises a protective plate arranged below a mowing disc. The protective plate serves as the end of a mower height adjustment and cutting assembly. The protective plate is in a stationary or rotating state relative to the rotating mowing disc.

[0006] Furthermore, the lawn mower height adjustment and cutting assembly includes a lawn mower motor height adjustment component and a lawn mower cutting component. The lawn mower motor height adjustment component includes a rotating block and a threaded barrel. The lawn mower motor is accommodated in the threaded barrel. The rotating block is threadedly connected to the threaded barrel. When the rotating block rotates around its own circumference, it drives the threaded barrel to perform lifting and lowering movements.

[0007] Furthermore, the protective plate is fixedly connected to the mowing disc via a limit screw, so that the protective plate is in a stationary state relative to the mowing disc in a rotating state.

[0008] Furthermore, a fixed shaft disc and a first bearing are provided between the mowing disc and the protective plate along the rotating shaft of the mowing disc from top to bottom. The fixed shaft disc is fixedly connected to the mowing disc, and a limit screw presses the first bearing against the fixed shaft disc.

[0009] Furthermore, it also includes a fixing seat and a second bearing arranged from top to bottom along the rotating shaft of the mowing disc, the second bearing is arranged between the fixed shaft disc and the fixing seat, and the limiting screw presses the second bearing against the fixing seat.

[0010] Furthermore, a gap is left between the protective plate and the blade installed on the mowing disc.

[0011] Furthermore, a fixing bracket for mounting a mowing motor is provided on the mowing disc, and the fixing bracket is provided between the mowing disc and the mowing motor height adjustment component of the mower height adjustment and cutting assembly.

[0012] Furthermore, the lawn mower motor height adjustment assembly also includes a knob and a cover plate, the knob is coaxially fixedly connected to the rotating block, the cover plate is arranged between the knob and the rotating block, and the cover plate is provided with a plurality of circular grooves distributed in a circular array with the rotating axis of the rotating block as the center, and the top of the rotating block is provided with a bead for embedding in the circular groove.

[0013] A lawn mower cutting assembly comprises a mowing disc and a cutting assembly protection device arranged on the mowing disc.

[0014] A lawn mower is provided with the above-mentioned cutting component protection device installed therein, and / or is provided with the above-mentioned lawn mower cutting component installed therein.

[0015] In summary, the benefits of the present invention are:

[0016] This utility model uses a mowing disc to mount the blades, and a protective plate at the bottom of the disc ensures the blades extend primarily radially for cutting, effectively isolating the blades from impacts below. Furthermore, the protective plate effectively prevents the mower's power consumption from increased due to issues like grass pinching. The protective plate utilizes a bearing-type connection and does not rotate synchronously with the disc, reducing motor load and ensuring stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a lawn mower according to the present invention.

[0018] Figure 2 It is a structural schematic diagram of the height adjustment and cutting components of the lawn mower of the present invention.

[0019] Figure 3 Schematic diagram of the cross-sectional structure of the cutting component of the lawn mower.

[0020] Figure 4 Schematic diagram of the exploded structure of the lawn mower cutting component.

[0021] Figure 5Schematic diagram of the exploded structure of the mowing motor height adjustment component.

[0022] Figure 6 Schematic diagram of the structure of the rotating block.

[0023] Markings in the figure: 1. Motor; 11. Fixed bracket; 2. Mowing disc; 21. Blade; 22. Rotating shaft; 3. Protective plate; 31. Fixed shaft disc; 32. Fixed seat; 331. First bearing; 332. Second bearing; 34. Limit screw; 4. Rotating block; 41. Boss; 42. Cylindrical barrel; 43. Bead; 5. Threaded barrel; 6. Knob; 61. Cover plate; 62. Circular groove. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed arbitrarily, and the component layout type may also be more complicated.

[0026] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the perpendicular relationship may actually be an approximately perpendicular relationship.

[0028] This embodiment discloses a lawn mower, which is provided with a lawn mower cutting assembly, a lawn mower motor height adjustment assembly, and a cutting assembly protection device.

[0029] Reference Figure 1 and Figure 2 The lawn mower cutting assembly includes a motor 1, a mowing disc 2, and a blade 21. Figure 3 and Figure 4The cutting assembly protection device includes a protective plate 3. The motor 1 is connected to the mowing disc 2 through a fixed bracket 11. The motor 1 drives the rotation of the mowing disc 2. The blade 21 is arranged on the peripheral side of the mowing disc 2. The protective plate 3 is arranged below the mowing disc 2 to protect the blade 21.

[0030] The fixed bracket 11 is fixedly installed inside the lawn mower, and the output shaft of the motor 1 is installed on the fixed bracket 11 with the output shaft facing downward. A driving block is fixedly provided on the output shaft of the motor 1, and the driving block is engaged with the mowing disc 2. The motor 1 drives the driving block to rotate through the output shaft, thereby driving the rotation of the mowing disc 2.

[0031] The blade 21 is connected to the lower side of the mowing disc 2. When the mowing disc 2 rotates, the blade 21 rotates around the blade mounting shaft (rotating shaft 22) on the mowing disc 2 to achieve mowing. Furthermore, to prevent the blade 21 from being damaged by excessive resistance due to dense grass or obstacles such as stones during mowing, the blade 21 is connected to the mowing disc 2 via a rotating shaft 22. The blade 21 can rotate around the rotating shaft 22. When the mowing disc 2 rotates vertically, the blade 21 is extended out of the mowing disc 2 due to centrifugal force to achieve mowing. When the blade 21 encounters excessive resistance, the blade 21 can rotate to the inside of the mowing disc 2 to avoid damage.

[0032] The connection between the blade 21 and the rotating shaft 22 of the mowing disc 2 is mainly used to protect the blade 21 in the circumferential direction. Furthermore, the protective plate 3 below the blade 21 forms bottom protection for the blade 21. The protective plate 3 and the mowing disc 2 are both coaxial disc-shaped structures. The outer diameter of the protective plate 3 is close to the outer diameter of the mowing disc 2. A certain gap is formed between the protective plate 3 and the mowing disc 2 to accommodate the blade 21 and the rotating shaft 22, which effectively prevents flying sand and stones from impacting the rotating shaft 22 and the blade 21 during operation, and prevents grass stems from getting stuck in the rotating shaft 22 and causing jamming.

[0033] In one embodiment, the protective plate 3 can be directly fixedly connected to the mowing disc 2, and the rotation of the mowing disc 2 will synchronously drive the rotation of the protective plate 3, so that the protective plate 3 is stationary relative to the rotating mowing disc 2.

[0034] In another embodiment, the bottom of the mowing disc 2 is fixedly connected to a fixed shaft disc 31 by bolts. The fixed shaft disc 31 is coaxial with the output shaft of the motor 1. The outer periphery of the fixed shaft disc 31 is tightly fitted with a first bearing 331. The outer periphery of the first bearing 331 is tightly fitted with a fixing seat 32. The protective plate 3 is fixedly connected to the fixing seat 32 by bolts. The setting of the bearing 33 enables the protective plate 3 and the fixing seat 32 to rotate relative to the fixed shaft disc 31, and then when the mowing disc 2 rotates at high speed, it does not synchronously drive the protective plate 3 to rotate. The protective plate 3 is a passive rotation. On the one hand, it reduces the load of the motor 1. On the other hand, if the mowing disc 2 rotates at high speed, it is easy to have excessive impact with grass, soil, stones, etc. during use, resulting in the overall structure being unstable and prone to vibration, while increasing the probability of failure. The passively rotating protective plate 3 not only has a protective effect, but also can effectively avoid obstacles to ensure stability and safety.

[0035] Furthermore, a second bearing 332 is tightly fitted on the outer periphery of the fixed shaft disc 31. The second bearing 332 is located on the lower side of the fixed seat 32, and its outer periphery is tightly fitted with the fixed seat 32. A limiting screw 34 is also threadedly connected to the axial direction of the fixed shaft disc 31. The nut of the limiting screw 34 abuts against the bearing 33 at the bottom to ensure a stable positional relationship between the bearing 33 and the fixed shaft disc 31.

[0036] Reference Figure 5 and Figure 6 The mowing motor height adjustment assembly includes a threaded barrel 5 and a rotating block 4. The motor is fixedly installed in the threaded barrel 5. The threaded barrel 5 is arranged in the lawn mower and can slide in the vertical direction. The outer peripheral wall of the threaded barrel 5 is provided with a thread. The rotating block 4 is sleeved on the outer periphery of the threaded barrel 5. The inner peripheral wall of the rotating block 4 is provided with a boss 41. The boss 41 can cooperate with the thread of the threaded barrel 5 so that the rotating block 4 can rotate relative to the threaded barrel 5.

[0037] A knob 6 is fixedly connected to the top of the rotating block 4, and the rotating block 4 and the knob 6 are coaxially fixedly connected, so that the user can rotate the knob 6 to synchronously drive the rotating block 4 to rotate, and then rotating the knob 6 can drive the rotation of the rotating block 4. When the rotating block 4 rotates, the vertical movement of the threaded barrel 5 can be achieved through the cooperation relationship between the boss 41 and the thread, so as to realize the lifting and lowering of the motor.

[0038] A cover plate 61 is further provided between the rotating block 4 and the knob 6. The cover plate 61 is located above the rotating block 4. A number of circular grooves 62 are provided on the cover plate 61, and the circular grooves 62 are distributed in a circular array with the axis of the rotating block 4 as the center. Correspondingly, a cylindrical tube 42 is provided on the top of the rotating block 4. The cylindrical tube 42 is provided with a circular groove opening upward, and a bead 43 is embedded in the top of the circular groove. The cylindrical tube 42 is made of elastic material, including but not limited to plastic, metal, resin, etc., so that the opening of the circular groove has a certain expansion and deformation ability. When the bead 43 is subjected to a downward force, it can move downward to a certain extent and rebound upward when the force is unloaded.

[0039] The radial distance between the dial ball 43 and the axis of the rotating block 4 is the same as the radial distance between the circular groove 62 and the axis of the rotating block 4. Therefore, the dial ball 43 can fit into one of the circular grooves 62. When the rotating block 4 rotates, the dial ball 43 moves along the distribution direction of the circular grooves 62, and enters the adjacent circular groove 62 from one circular groove 62 in turn. When moving between the two adjacent circular grooves 62, it is squeezed. The squeezing force is transmitted to the user's hand through the rotating block 4 and the knob 6, forming a damping feedback force, so that the user can roughly judge the degree of rotation.

[0040] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A cutting assembly protection device, characterized in that: The utility model comprises a protective plate (3) arranged below a mowing disc (2), the protective plate (3) serving as the end of a mower height adjustment and cutting assembly, and the protective plate (3) is in a stationary or rotating state relative to the mowing disc (2) in a rotating state.

2. The cutting assembly protection device according to claim 1, characterized in that: The lawn mower height adjustment and cutting assembly comprises a lawn mower motor height adjustment component and a lawn mower cutting component. The lawn mower motor height adjustment component comprises a rotating block (4) and a threaded barrel (5). The lawn mower motor is accommodated in the threaded barrel (5). The rotating block (4) is threadedly connected to the threaded barrel (5). When the rotating block (4) rotates around its own circumference, it drives the threaded barrel (5) to perform lifting and lowering movements.

3. The cutting assembly protection device according to claim 1, characterized in that: The protective plate (3) is fixedly connected to the mowing disc (2) via a limit screw (34), so that the protective plate (3) is in a stationary state relative to the mowing disc (2) in a rotating state.

4. The cutting assembly protection device according to claim 2, characterized in that: A fixed shaft disc (31) and a first bearing (331) are provided between the mowing disc (2) and the protective plate (3) from top to bottom along the rotating shaft of the mowing disc (2); the fixed shaft disc (31) is fixedly connected to the mowing disc (2); and a limit screw (34) presses the first bearing (331) against the fixed shaft disc (31).

5. The cutting assembly protection device according to claim 4, characterized in that: It also comprises a fixing seat (32) and a second bearing (332) arranged from top to bottom along the rotating shaft of the mowing disc (2); the second bearing (332) is arranged between the fixing shaft disc (31) and the fixing seat (32); the limiting screw (34) presses the second bearing (332) against the fixing seat (32).

6. The cutting assembly protection device according to claim 1, characterized in that: A gap is left between the protective plate (3) and the blade (21) mounted on the mowing disc (2).

7. The cutting assembly protection device according to claim 1, characterized in that: The mowing disc (2) is provided with a fixing bracket (11) for mounting a mowing motor (1), and the fixing bracket (11) is arranged between the mowing disc (2) and a mowing motor height adjustment component of the mower height adjustment and cutting assembly.

8. The cutting assembly protection device according to claim 2, characterized in that: The mowing motor height adjustment assembly further comprises a knob (6) and a cover plate (61); the knob (6) is coaxially fixedly connected to the rotating block (4); the cover plate (61) is arranged between the knob (6) and the rotating block (4); the cover plate (61) is provided with a plurality of circular grooves (62) distributed in a circular array with the rotating shaft of the rotating block (4) as the center; and a ball (43) for embedding into the circular groove (62) is arranged on the top of the rotating block (4).

9. A lawn mower cutting assembly, characterized in that: The invention comprises a mowing disc (2) and a cutting assembly protection device as claimed in any one of claims 1 to 8, which is arranged on the mowing disc (2).

10. A lawn mower, characterized in that: A cutting assembly protection device as described in any one of claims 1 to 8 and / or a lawn mower cutting assembly as described in claim 9 are installed inside.

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